BUSHEHR, Iran (Reuters) - Iran has reached a "basic" agreement with Russia on a joint venture to enrich uranium and will contine talks on this issue in coming days, Iran's nuclear chief Gholamreza Aghazadeh said on Sunday.

"Regarding this joint venture, we have reached a basic agreement. Talks to complete this package will continue in coming days in Russia," he told reporters in the southern Iranian port of Bushehr.